Process of producing calcium silicid.



THOIEAS LEOPDLD VJILLSUN AND MAXKMILIAN MATTHIAS HAFF, OF OTTAWA, 0N- TARIQ, CANADA; SAID HAFF ASSIGNOR TO SAID WILLSON.

PROCESS OF ERODYCING CALCIUM SILICIID.

Ho Drawing.

silicid at a much less cost than hitherto pos-' sible.

Calcium s1hc1d is useful for the desult'urizing, dephosphorizing and deoxidizing of metals, but it is an exceedingly tedious process to manufacture the same by any hitherto known method and is practically prohihitive.

According to the present invention, an alkaline earth compound is mixed with silica and caused to react by heat of the electric are.

In the present method 0t carrying out the invention, a metallic carhid of an alkaline earth, such as calcium carbid is mixed with silica and enough free carbon added to satisfy the oxygen of the silica. We have found that when calcium carhid is employed, satisfactory roportlous for the 'mixture would he as ollows:

Calcium. carbid M 64 parts. Silica 120 parts. Carbon 24 parts.

The above described mixture is subjected to a sutlicient amount of heat to effect reduction of the silica and combination therewith of the calcium.

To produce the ca cium silicid, we have found that practically the only means that, can be employed to secure the requisite degree of heat is the electric arc, but it is evident, that if it could be secured in any other way, the re-action would occur with equal facility. The resultant product is acalcium silicid, presumably having the formula CaSi,, out, it is to he \unlerstood that. the process might under certain circumstances result in the production of other proportions of calcium and silicon than is expressed by Specification of Letters Yatent. Patcgnted Sept, 14, 1909.

Application filed April 2, 1809. Serial No. $87,488.

the formula CaSi. It is believed however,

thatthe re-action will be according to the following equation.

As many changes could be made in the above process, and many apparently widely different embodiments .01 our invention within the scope of the claims could be made withoutdeparting from the spirit or scope thereof. it is intended that all matter contained in the accompanying specifications,

shall be interpreted as illustrative and not in a limiting sense.

It may also he mentioned that-the term metal carbid of alkaline earth is intended to include other carbines than that of calcium, such as for example, barium carbid.

lVhat we claim as our invention is:

1. The herein described process of producing a compound containing an alkaline earth metal and silicon. which comprises heating a nzietallic cal-bid of an alkaline *arth 'with silica under proper conditionsto produce a compound containing calcium and silicon.

2. The herein described process of producing a compound containing an alkaline earth metal and silicon. which'compriscs heating a metallic carbid of an alkaline earth with silica in the electric arc.

The herein described process of producing a cmnpound containing an alkaline earth metal and silicon, which comprises heating calcium carbid with silica.

T. T he herein described process of producing a compound containing an alkaline earth mctal and silicon, which comprises heating together calcium carhid, silica and carbon.

'lho herein described processor producing a compound containing an alkaline I earth. metal and silicon, which comprises subjecting a mixture ot calcuuu (2lii)l(l,$lll0fi and carbon to the actual ot the electric arc.

In witness whereof, we have hereunto set our hands in the presence of two witnesses.

THOMAS hllOlOliD WlLLSON.

. lllAXllillhlAN MAITHIAS llAFF.

Witnesses:

lli ssma. S. SMART, War. A. lVYaiaN. 

